1. A remark on the existence of small solutions to a fourth order boundary value problem with large nonlinearity
:PINDA, Ľudovít. A remark on the existence of small solutions to a fourth order boundary value problem with large nonlinearity. In Mathematica Slovaca. - Bratislava : Mathematical Institute Slovak Academy of Sciences, 1993. ISSN 0139-9918, 1993, vol. 43, no. 2, pp. 149-170.